/*
 *  Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF licenses this file to You under the Apache License, Version 2.0
 *  (the "License"); you may not use this file except in compliance with
 *  the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

package org.apache.tomcat.util.collections;

import java.util.Enumeration;

import org.apache.tomcat.util.buf.MessageBytes;

/**
 * Enumerate the values for a (possibly ) multiple value element.
 */
class MultiMapValuesEnumeration implements Enumeration {
	int pos;
	int size;
	MessageBytes next;
	MultiMap headers;
	String name;

	MultiMapValuesEnumeration(MultiMap headers, String name, boolean toString) {
		this.name = name;
		this.headers = headers;
		pos = 0;
		size = headers.size();
		findNext();
	}

	private void findNext() {
		next = null;
		for (; pos < size; pos++) {
			MessageBytes n1 = headers.getName(pos);
			if (n1.equalsIgnoreCase(name)) {
				next = headers.getValue(pos);
				break;
			}
		}
		pos++;
	}

	public boolean hasMoreElements() {
		return next != null;
	}

	public Object nextElement() {
		MessageBytes current = next;
		findNext();
		return current.toString();
	}
}
